2018 · 10 citations · 8 references
EngineeringElectrical EngineeringLow-power DesignPower ElectronicsSemiconductor DevicesConverter TopologiesDc-dc ConversionDc-dc ConvertersEnergy-efficient LightingGate Drive CircuitsLighting ElectronicsBootstrap Gate Drive CircuitsGate Driver DesignHigh-efficiency ConverterLed LightingPower Electronic ConvertersSmart Home ApplicationsWide Bandgap Semiconductor ConvertersWide Input Voltage Range
This paper presents a 40V-to-8V hybrid DC-DC converter based on 5-to-1 Dickson converter. The converter can efficiently support wide and flexible output voltage ranges up to the input voltage, suitable for Smart Home LED driver applications. The GaN-based hybrid DC-DC converter prototype is experimentally verified with commercial LED lamp, achieving peak efficiency of 94% while providing ∼1,2A at wide output range from 4V to 28V. A modified bootstrap driver circuit is proposed to significantly reduce the number of gate drivers by ∼57%, leading to a substantial decrease of circuit size and cost. Measurement results show that 94% peak efficiency is achieved for the converter using the proposed bootstrap circuit.
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